Width Across Flats: 0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
Thread Series: UNIFIED NATIONAL COARSE (UNC)
Hardness Rating: 80.0 ROCKWELL B MINIMUM
Material Document and Classification: QQ-N-281,GR400,CL A FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-281,GR405,CL B FED SPEC 2ND MATERIAL RESPONSE OVERALL
Thread Direction: RIGHT-HAND
Nominal Thread Size: 0.625 INCHES IN
Nut Height: 0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
Identification
NSN: 5310-01-475-1138
NIIN: 014751138
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
General Description
The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-475-1138, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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
5310-01-475-1138
Item Name
Nut,plain,hexagon
FSC / FSG
5310 / 53 — Nuts and Washers
Status
ACTIVE
Width Across Flats
0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
Thread Series
UNIFIED NATIONAL COARSE (UNC)
Hardness Rating
80.0 ROCKWELL B MINIMUM
Material Document and Classification
QQ-N-281,GR400,CL A FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-281,GR405,CL B FED SPEC 2ND MATERIAL RESPONSE OVERALL
Thread Direction
RIGHT-HAND
Nominal Thread Size
0.625 INCHES IN
Nut Height
0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
Nut Style
HEXAGON
Thread Class
2B
Thread Quantity Per Inch
11
Material
NICKEL ALLOY AND COPPER ALLOY OVERALL
Bearing Surface Type
CHAMFERED OR WASHER FACED
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 Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-475-6622845-6655309 ITEM 5-2POSSIBLE MATCH
CONNECTING LINK,RIGID
Possible match (shared part number)Naval Sea Systems Command
5355-01-477-40542640-682-09 ITEM 20-3POSSIBLE MATCH
KNOB
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5305-01-480-20322640-682-09 ITEM 16-2POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5305-01-480-20796655309 ITEM 3-3POSSIBLE MATCH
SCREW,EXTERNALLY RELIEVED BODY
Possible match (shared part number)Naval Sea Systems Command
5305-01-480-20912640-682-09 ITEM 2-4POSSIBLE MATCH
SETSCREW
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5305-01-480-22002640-682-09 ITEM 2-3POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5355-01-481-696536-01-7822POSSIBLE MATCH
KNOB
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4940-01-508-3444845-6655309 ITEM 3-1POSSIBLE MATCH
RESEATING OUTFIT,GLOBE-ANGLE-CRO
Possible match (shared part number)Naval Sea Systems Command
4940-01-508-3454845-6655309 ITEM 2-1POSSIBLE MATCH
RESEATING OUTFIT,GLOBE-ANGLE-CRO
Possible match (shared part number)Naval Sea Systems Command
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
60-07-0829A
5/1Secondary reference
U.S. Government activity
0.62511UNC2BT1G405NSA/B
2/2Government specification standardization
U.S. Government activity
0.625-11UNC-2B TY1 MIL-S-1222
5/1Secondary reference
U.S. Government activity
845-6655309 ITEM 5-4-2
5/1Secondary reference
Naval Sea Systems Command
2640-682-09 ITEM 5-4-2
5/1Secondary reference
U.S. Government activity
6655309
D/9Drawing number reference only
Naval Sea Systems Command
Related Parts
3040-01-475-6622POSSIBLE MATCH
CONNECTING LINK,RIGID
845-6655309 ITEM 5-2
5355-01-477-4054POSSIBLE MATCH
KNOB
2640-682-09 ITEM 20-3
5305-01-480-2032POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
2640-682-09 ITEM 16-2
5305-01-480-2079POSSIBLE MATCH
SCREW,EXTERNALLY RELIEVED BODY
6655309 ITEM 3-3
5305-01-480-2091POSSIBLE MATCH
SETSCREW
2640-682-09 ITEM 2-4
5305-01-480-2200POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
2640-682-09 ITEM 2-3
5355-01-481-6965POSSIBLE MATCH
KNOB
36-01-7822
4940-01-508-3444POSSIBLE MATCH
RESEATING OUTFIT,GLOBE-ANGLE-CRO
845-6655309 ITEM 3-1
4940-01-508-3454POSSIBLE MATCH
RESEATING OUTFIT,GLOBE-ANGLE-CRO
845-6655309 ITEM 2-1
Frequently Asked Questions
What is NSN 5310-01-475-1138?
NSN 5310-01-475-1138 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
What NSN replaces 5310-01-475-1138?
9 possible matches (shared part number, not a government interchangeability claim): 3040-01-475-6622, 5355-01-477-4054, 5305-01-480-2032. Verify interchangeability with system specifications before substitution.
What are the specifications of 5310-01-475-1138?
Key specifications for 5310-01-475-1138: Width Across Flats: 0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Hardness Rating: 80.0 ROCKWELL B MINIMUM; Material Document and Classification: QQ-N-281,GR400,CL A FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-281,GR405,CL B FED SPEC 2ND MATERIAL RESPONSE OVERALL. 12 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-475-1138 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.