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84905 — WASHER,FLAT

✓ Government record, cited
Hama · ORING SEAL
PRODUCT OVERVIEW

84905: WASHER,FLAT.

- Elegant aluminium frame for a stylish atmosphere - Incl. mount for photos of the size 28 x 28 cm. Key specifications include material: STEEL COMP 8740 OVERALL, thickness: 0.060 INCHES NOMINAL IN, design_type: FRICTION, thread_class: 2A A, hole_diameter: 1.020 INCHES NOMINAL IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM.

This part is cataloged in the U.S. Government catalog under NSN 5340-00-090-4742, 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
84905
NSN: 5340-00-090-4742
NIINs: 000904742, 000917018
FSC: 5340 — Hardware, Commercial
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
thickness0.060 INCHES NOMINAL IN
design_typeFRICTION
thread_class2A A
hole_diameter1.020 INCHES NOMINAL IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
overall_diameter1.680 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-S-6049 MIL SPEC ALL MATERIAL RESPONSES OVERALL
thread_size_and_series/type_designator0.687-24 UNEF
NSN5340-00-090-4742
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 84905 MFR: Hama ⚠ 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
•
DESIGN TYPE: FRICTION
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.500 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.687-24 UNEF
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.500 INCHES NOMINAL IN
THREAD CLASS2A A
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.687-24 UNEF
SUBSTITUTES & CROSS-REFERENCES 4
22294Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
10-21494Reference document
Same NSN cross-reference
Reference document — Secondary reference
12976Reference document
Same NSN cross-reference
Reference document — Secondary reference
53189Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 84905?
84905 is a WASHER,FLAT manufactured by Hama.
What parts can replace 84905?
There are 4 known substitutes for 84905: 22294, 10-21494, 12976 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 84905?
84905 is cataloged in the U.S. Government catalog under NSN 5340-00-090-4742. 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.