Width Across Flats: 0.313 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
Head Height: 0.438 INCHES NOMINAL IN
Fastener Length: 2.673 INCHES MINIMUM AND 2.703 INCHES MAXIMUM IN
Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Thread Length: 0.787 INCHES MINIMUM AND 0.837 INCHES MAXIMUM IN
Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
Material Document and Classification: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
Identification
NSN: 5306-00-208-7403
NIIN: 002087403
FSC: 5306 — Bolts
FSG: 53 — Hardware and Abrasives
General Description
The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-208-7403, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5306-00-208-7403
Item Name
Bolt,internal Wrenching
FSC / FSG
5306 / 53 — Bolts
Status
ACTIVE
Width Across Flats
0.313 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
Head Height
0.438 INCHES NOMINAL IN
Fastener Length
2.673 INCHES MINIMUM AND 2.703 INCHES MAXIMUM IN
Surface Treatment Document and Classification
QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Thread Length
0.787 INCHES MINIMUM AND 0.837 INCHES MAXIMUM IN
Hardness Rating
34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
Material Document and Classification
MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
Nominal Thread Diameter
0.438 INCHES IN
Thread Direction
RIGHT-HAND
Surface Treatment
CADMIUM AND CHROMATE OVERALL
Minimum Tensile Strength
160000 POUNDS PER SQUARE INCH LBS
Internal Drive Style
HEXAGON
Thread Class
3A A
Thread Quantity Per Inch
20
Material
STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL
Thread Series Designator
UNF
Head Diameter
0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items10
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5306-00-275-8505MS20006H27POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-276-8329MS20007H24POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-286-1962MS20007H19POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-286-1971MS20007H13POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-292-8155MS20005H9POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-292-8161MS20008H51POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-297-4259MS2005-33POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-297-4278MS20005-31POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-298-4812MS20008H29POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5306-00-531-9513MS20010H107POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MS20007-30
2/2Government specification standardization
U.S. Government activity
NASM7838
5/1Secondary reference
U.S. Government activity
Related Parts
5306-00-275-8505POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20006H27
5306-00-276-8329POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20007H24
5306-00-286-1962POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20007H19
5306-00-286-1971POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20007H13
5306-00-292-8155POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20005H9
5306-00-292-8161POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20008H51
5306-00-297-4259POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS2005-33
5306-00-297-4278POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20005-31
5306-00-298-4812POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20008H29
5306-00-531-9513POSSIBLE MATCH
BOLT,INTERNAL WRENCHING
MS20010H107
Frequently Asked Questions
What is NSN 5306-00-208-7403?
NSN 5306-00-208-7403 is a Bolt,internal Wrenching, classified under FSC 5306, Bolts. Status: active.
What NSN replaces 5306-00-208-7403?
10 possible matches (shared part number, not a government interchangeability claim): 5306-00-275-8505, 5306-00-276-8329, 5306-00-286-1962. Verify interchangeability with system specifications before substitution.
What are the specifications of 5306-00-208-7403?
Key specifications for 5306-00-208-7403: Width Across Flats: 0.313 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN; Head Height: 0.438 INCHES NOMINAL IN; Fastener Length: 2.673 INCHES MINIMUM AND 2.703 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 17 specifications are documented in the U.S. Government catalog.
Is NSN 5306-00-208-7403 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.