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1021-548 — CONNECTOR,RECEPTACLE,ELECTRICAL

✓ Government record, cited
3M · ORING SEAL
PRODUCT OVERVIEW

1021-548: CONNECTOR,RECEPTACLE,ELECTRICAL.

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include body_style: STRAIGHT TYPE, temp_rating: -40.0 FAHRENHEIT AND 212.0 FAHRENHEIT DEGF, overall_width: 0.315 INCHES NOMINAL IN, terminal_type: PIN SINGLE MATING END SINGLE CONTACT GROUPING, overall_height: 0.641 INCHES NOMINAL IN, overall_length: 2.460 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-684-3460, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
1021-548
NSN: 5330-00-684-3460
NIINs: 006843460, 011425026
FSC: 5330 — Packing and Gasket Materials
CAGE: 10137 — SZEMCO INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OR RUBBER POLYESTER URETHANE CLASS AU OR RUBBER POLYETHER URETHANE CLASS EU OVERALL
body_styleSTRAIGHT TYPE
temp_rating-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT DEGF
overall_width0.315 INCHES NOMINAL IN
terminal_typePIN SINGLE MATING END SINGLE CONTACT GROUPING
overall_height0.641 INCHES NOMINAL IN
overall_length2.460 INCHES NOMINAL IN
hardness_rating65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
insert_materialPLASTIC SINGLE MATING END
contact_materialCOPPER ALLOY SINGLE MATING END SINGLE CONTACT GROUPING
outside_diameter1.111 INCHES MINIMUM AND 1.131 INCHES MAXIMUM IN
style_designatorCIRCULAR
NSN5330-00-684-3460
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1021-548 MFR: 3M ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
TEMP RATING: -40.0 FAHRENHEIT AND 212.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL THICKNESS: 0.151 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
•
HARDNESS RATING: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D2000 GRADE 5BG715AB1E5F1 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 1.111 INCHES MINIMUM AND 1.131 INCHES MAXIMUM IN
•
APERTURE DIAMETER: 0.853 INCHES MINIMUM AND 0.863 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
TEMP RATING-40.0 FAHRENHEIT AND 212.0 FAHRENHEIT DEGF
CROSS-SECTIONAL THICKNESS0.151 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
HARDNESS RATING65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D2000 GRADE 5BG715AB1E5F1 ASSN STD ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER1.111 INCHES MINIMUM AND 1.131 INCHES MAXIMUM IN
APERTURE DIAMETER0.853 INCHES MINIMUM AND 0.863 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OR RUBBER POLYESTER URETHANE CLASS AU OR RUBBER POLYETHER URETHANE CLASS EU OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
A-A-52468Reference document
Same NSN cross-reference
Reference document — Identification reference
A 52468-2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS51091-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
560E21-2027Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1021-548?
1021-548 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by 3M.
What parts can replace 1021-548?
There are 4 known substitutes for 1021-548: A-A-52468, A 52468-2, MS51091-2 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1021-548?
1021-548 is cataloged in the U.S. Government catalog under NSN 5330-00-684-3460. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.