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NSN 5310-00-005-0781Government record, cited

Nut, Plain, Welding5310-00-005-0781

NSN 5310-00-005-0781 · NIIN 000050781 · Part number 9F2978
Caterpillar Inc Div Caterpillar Defense · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 11083
Government record, cited
NSN 5310-00-005-0781 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-005-0781. Manufacturer of record part number: 9F2978.
Also searched as  5310-00-005-0781 · 5310000050781 · NIIN 000050781 · 00-005-0781 · FSC 5310 Nuts and Washers · CAGE 11083 · 9F2978
Nearby stock numbers  ·
Features
  • Nut,plain,welding — FSC 5310
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Thread Direction: RIGHT-HAND
  • Nominal Thread Size: 0.375 INCHES IN
  • Nut Thickness: 0.312 INCHES NOMINAL IN
  • Nut Style: PLAIN WELDING
  • Thread Class: 2B
  • Thread Quantity Per Inch: 16
Identification
  • NSN: 5310-00-005-0781
  • NIIN: 000050781
  • FSC: 5310 — Nuts and Washers
  • FSG: 53 — Hardware and Abrasives
  • Primary part number: 9F2978
  • Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description

The Nut,plain,welding, cataloged under National Stock Number 5310-00-005-0781, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-005-0781
Primary Part Number9F2978
Item NameNut,plain,welding
FSC / FSG5310 / 53 — Nuts and Washers
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Thread DirectionRIGHT-HAND
Nominal Thread Size0.375 INCHES IN
Nut Thickness0.312 INCHES NOMINAL IN
Nut StylePLAIN WELDING
Thread Class2B
Thread Quantity Per Inch16
MaterialSTEEL OVERALL
Width Across Corners0.625 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
9F2978 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
No interchangeability data on file.
Other items in FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-00-005-0781?

NSN 5310-00-005-0781 is a Nut,plain,welding, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-00-005-0781?

NSN 5310-00-005-0781 has 1 manufacturer part number on file: 9F2978 (Caterpillar Inc Div Caterpillar Defense).

What are the specifications of 9F2978?

Key specifications for 9F2978: Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.375 INCHES IN; Nut Thickness: 0.312 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.

Is NSN 5310-00-005-0781 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.
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