NSN 5310-01-276-3344 · NIIN 012763344 · Part number 3-4819-8-412-52
Air-Log Ltd · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE K4340
Government record, cited
NSN 5310-01-276-3344 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-276-3344. Manufacturer of record part number: 3-4819-8-412-52.
Also searched as5310-01-276-3344 ·
5310012763344 ·
NIIN 012763344 ·
01-276-3344 ·
FSC 5310 Nuts and Washers · CAGE K4340 · 3-4819-8-412-52 · MIL-W-12133/3 · M12133/3-176 · BS SP 134-C
Hardness Rating: 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM
Material Document and Classification: ASTM B194,1/4 HARD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter: 0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
Material Thickness: 0.010 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
Material: COPPER ALLOY 172 OVERALL
Hole Diameter: 0.176 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
2 manufacturer part numbers on file
Identification
NSN: 5310-01-276-3344
NIIN: 012763344
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 3-4819-8-412-52
Manufacturer: Air-Log Ltd
General Description
The Washer,spring Tension, cataloged under National Stock Number 5310-01-276-3344, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Air-Log Ltd. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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
5310-01-276-3344
Primary Part Number
3-4819-8-412-52
Item Name
Washer,spring Tension
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Air-Log Ltd
Status
ACTIVE
Hardness Rating
350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM
Material Document and Classification
ASTM B194,1/4 HARD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter
0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
Material Thickness
0.010 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
Material
COPPER ALLOY 172 OVERALL
Hole Diameter
0.176 INCHES MINIMUM AND 0.181 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 Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
NSN 5310-01-276-3344 is a Washer,spring Tension, manufactured by Air-Log Ltd, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-276-3344?
NSN 5310-01-276-3344 has 2 manufacturer part numbers on file: 3-4819-8-412-52 (Air-Log Ltd), BS SP 134-C (Bsi Standards Limited).
What NSN replaces 5310-01-276-3344?
9 possible matches (shared part number, not a government interchangeability claim): 5310-01-299-7027, 5310-01-299-7028, 5310-01-299-7029. Verify interchangeability with system specifications before substitution.
What are the specifications of 3-4819-8-412-52?
Key specifications for 3-4819-8-412-52: Overall Height: 0.027 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN; Hardness Rating: 350.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 380.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM; Material Document and Classification: ASTM B194,1/4 HARD ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN. 6 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-276-3344 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.