NSN 5305-00-253-7630 · NIIN 002537630 · Part number 1M644
Caterpillar Inc Div Caterpillar Defense · FSC 5305 — Screws · FSG 53 — Hardware and Abrasives · CAGE 11083
Government record, cited
NSN 5305-00-253-7630 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-253-7630. Manufacturer of record part number: 1M644.
Head Height: 0.270 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
Fastener Length: 2.250 INCHES NOMINAL IN
Thread Length: 1.625 INCHES NOMINAL IN
Head Style: HEXAGON
Width Between Flats: 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
Thread Class: 2A A
3 manufacturer part numbers on file
Identification
NSN: 5305-00-253-7630
NIIN: 002537630
FSC: 5305 — Screws
FSG: 53 — Hardware and Abrasives
Primary part number: 1M644
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-253-7630, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016
5305-00-001-5016 · Item name not on file
5305-00-001-9160
5305-00-001-9160 · Item name not on file
5305-00-001-9629
SCREW,ADJUSTING CLEVIS
5305-00-001-9742
5305-00-001-9742 · Item name not on file
5305-00-001-9768
SCREW,CAP,SOCKET HEAD
5305-00-003-4306
SCREW,MACHINE
5305-00-003-6694
5305-00-003-6694 · Item name not on file
5305-00-003-6753
5305-00-003-6753 · Item name not on file
Frequently Asked Questions
What is NSN 5305-00-253-7630?
NSN 5305-00-253-7630 is a Screw,cap,hexagon Head, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5305, Screws. Status: active.
What part numbers are listed for NSN 5305-00-253-7630?
NSN 5305-00-253-7630 has 3 manufacturer part numbers on file: 17KP397 (Oshkosh Defense Llc), 1M0644 (Caterpillar Inc Div Caterpillar Defense), 1M644 (Caterpillar Inc Div Caterpillar Defense).
What are the specifications of 1M644?
Key specifications for 1M644: Head Height: 0.270 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN; Fastener Length: 2.250 INCHES NOMINAL IN; Thread Length: 1.625 INCHES NOMINAL IN; Head Style: HEXAGON. 6 specifications are documented in the U.S. Government catalog.
Is NSN 5305-00-253-7630 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.