NSN 5305-01-657-2507 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-657-2507. Manufacturer of record part number: 4000280008.
Nearby stock numbers← 5305-01-657-2505 Screw, Cap, Hexagon Head
·
5305-01-657-2535 Screw, Cap, Socket Head →
5305-01-657-2507 — Screws
Features
Screw,cap,hexagon Head — FSC 5305
Head Height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
Fastener Length: 1.00 INCHES NOMINAL IN
Thread Length: 1.00 INCHES NOMINAL IN
Material Document and Classification: SAE J429 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nominal Thread Diameter: 0.3125 INCHES IN
Head Style: HEXAGON
Thread Direction: RIGHT-HAND
Identification
NSN: 5305-01-657-2507
NIIN: 016572507
FSC: 5305 — Screws
FSG: 53 — Hardware and Abrasives
Primary part number: 4000280008
Manufacturer: Oshkosh Defense Llc
General Description
The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-657-2507, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
5305-01-657-2507
Primary Part Number
4000280008
Item Name
Screw,cap,hexagon Head
FSC / FSG
5305 / 53 — Screws
Manufacturer
Oshkosh Defense Llc
Status
ACTIVE
Head Height
0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
Fastener Length
1.00 INCHES NOMINAL IN
Thread Length
1.00 INCHES NOMINAL IN
Material Document and Classification
SAE J429 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Nominal Thread Diameter
0.3125 INCHES IN
Head Style
HEXAGON
Thread Direction
RIGHT-HAND
Width Between Flats
0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
Color
BLACK OVERALL
Surface Treatment
MAGNI BLACK 575 LOCATION NOT OTHERWISE SPECIFIED
Thread Class
2A A
Thread Quantity Per Inch
18
Material
STEEL OVERALL
Thread Series Designator
UNIFIED NATIONAL COARSE (UNC)
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 Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5305-01-657-843612640958-003POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)U S Army Tank Automotive Command Amsta-Im-Mm
5305-01-657-84584000280007POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Oshkosh Defense Llc
5305-01-657-89874000280012POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Oshkosh Defense Llc
5305-01-658-96954000280005POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Oshkosh Defense Llc
5305-01-659-83934000280001POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Oshkosh Defense Llc
5305-01-666-32794000280013POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Oshkosh Defense Llc
5305-01-687-27294000280017POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Oshkosh Defense Llc
U S Army Tank Automotive Command Amsta-Im-Mm (USA)
Reference documents
Reference
Meaning
4000280
D/9Drawing number reference only
Oshkosh Defense Llc
Related Parts
5305-01-657-8436POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
12640958-003
5305-01-657-8458POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
4000280007
5305-01-657-8987POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
4000280012
5305-01-658-9695POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
4000280005
5305-01-659-8393POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
4000280001
5305-01-666-3279POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
4000280013
5305-01-687-2729POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
4000280017
Frequently Asked Questions
What is NSN 5305-01-657-2507?
NSN 5305-01-657-2507 is a Screw,cap,hexagon Head, manufactured by Oshkosh Defense Llc, classified under FSC 5305, Screws. Status: active.
What part numbers are listed for NSN 5305-01-657-2507?
NSN 5305-01-657-2507 has 2 manufacturer part numbers on file: 4000280008 (Oshkosh Defense Llc), 12640958-005 (U S Army Tank Automotive Command Amsta-Im-Mm).
What NSN replaces 5305-01-657-2507?
7 possible matches (shared part number, not a government interchangeability claim): 5305-01-657-8436, 5305-01-657-8458, 5305-01-657-8987. Verify interchangeability with system specifications before substitution.
What are the specifications of 4000280008?
Key specifications for 4000280008: Head Height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN; Fastener Length: 1.00 INCHES NOMINAL IN; Thread Length: 1.00 INCHES NOMINAL IN; Material Document and Classification: SAE J429 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 14 specifications are documented in the U.S. Government catalog.
Is NSN 5305-01-657-2507 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.