NSN 5310-01-283-3920 · NIIN 012833920 · Part number 4M307-3-26
The Boeing Company Div Defense · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 76301
Government record, cited
NSN 5310-01-283-3920 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-283-3920. Manufacturer of record part number: 4M307-3-26.
Also searched as5310-01-283-3920 ·
5310012833920 ·
NIIN 012833920 ·
01-283-3920 ·
FSC 5310 Nuts and Washers · CAGE 76301 · 4M307-3-26 · 4M307
Nearby stock numbers← 5310-01-283-3717 Nut Assembly, Self-Locking, Gang C
·
5310-01-283-3921 Washer, Flat →
5310-01-283-3920 — Nuts and Washers
Features
Washer,flat — FSC 5310
Surface Treatment Document and Classification: MIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Overall Diameter: 1.484 INCHES NOMINAL IN
Material Document and Classification: QQ-A-250/11, COND 6 FED STD SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style: RECTANGULAR
Peripheral Shape Style: ROUND
Material: ALUMINUM ALLOY 6061 OVERALL
Center Hole Shape Style: ROUND
Identification
NSN: 5310-01-283-3920
NIIN: 012833920
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 4M307-3-26
Manufacturer: The Boeing Company Div Defense
General Description
The Washer,flat, cataloged under National Stock Number 5310-01-283-3920, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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
5310-01-283-3920
Primary Part Number
4M307-3-26
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
The Boeing Company Div Defense
Status
ACTIVE
Surface Treatment Document and Classification
MIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Overall Diameter
1.484 INCHES NOMINAL IN
Material Document and Classification
QQ-A-250/11, COND 6 FED STD SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape Style
RECTANGULAR
Peripheral Shape Style
ROUND
Material
ALUMINUM ALLOY 6061 OVERALL
Center Hole Shape Style
ROUND
Hole Diameter
0.406 INCHES NOMINAL IN
Thickness
0.023 INCHES MINIMUM AND 0.027 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 Items11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5310-01-283-39214M307-6-64POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Trico Manufacturing Inc.
5310-01-283-97604M307-2-29POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Trico Manufacturing Inc.
5310-01-283-97664M307-7-58POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Trico Manufacturing Inc.
5310-01-407-61254M307-7-52POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)The Boeing Company Div Defense
5310-01-603-77774M307-7-79POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)Anillo Industries Llc
5310-01-629-85174M307-1-19POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)The Boeing Company Div Defense
5310-01-718-77714M307-3-80POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)The Boeing Company Div Defense
5310-01-719-83904M307-3-69POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)The Boeing Company Div Defense
5310-01-721-57474M307-6-23POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)The Boeing Company Div Defense
5310-01-723-13354M307-5-17POSSIBLE MATCH
WASHER,FLAT
Possible match (shared part number)The Boeing Company Div Defense
NSN 5310-01-283-3920 is a Washer,flat, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-283-3920?
NSN 5310-01-283-3920 has 1 manufacturer part number on file: 4M307-3-26 (The Boeing Company Div Defense).
What NSN replaces 5310-01-283-3920?
11 possible matches (shared part number, not a government interchangeability claim): 5310-01-283-3921, 5310-01-283-9760, 5310-01-283-9766. Verify interchangeability with system specifications before substitution.
What are the specifications of 4M307-3-26?
Key specifications for 4M307-3-26: Surface Treatment Document and Classification: MIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.484 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/11, COND 6 FED STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 9 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-283-3920 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.