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90983A212 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

90983A212: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 1.750 INCHES NOMINAL IN, material: STEEL STANDOFF, thread_class: 2B LEFT INTERNAL (INCLUDES THRU THREAD), thread_length: 1.750 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, style_designator: INTERNALLY THREADED FULL LENGTH, thread_direction: RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD). This part is cataloged in the U.S.

Government catalog under NSN 5340-01-656-9325, 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
90983A212
NSN: 5340-01-656-9325
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
length1.750 INCHES NOMINAL IN
materialSTEEL STANDOFF
thread_class2B LEFT INTERNAL (INCLUDES THRU THREAD)
thread_length1.750 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
style_designatorINTERNALLY THREADED FULL LENGTH
thread_directionRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
surface_treatmentZINC STANDOFF
width_across_flats0.625 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN
cross-sectional_shapeHEXAGON
thread_quantity_per_inch24 LEFT INTERNAL (INCLUDES THRU THREAD)
thread_series_designatorUNF LEFT INTERNAL (INCLUDES THRU THREAD)
NSN5340-01-656-9325
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 90983A212 MFR: OEM ⚠ 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
•
WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
LENGTH: 1.750 INCHES NOMINAL IN
•
THREAD LENGTH: 1.750 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
•
STYLE DESIGNATOR: INTERNALLY THREADED FULL LENGTH
•
THREAD DIRECTION: RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
•
NOMINAL THREAD SIZE: 0.375 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN
•
CROSS-SECTIONAL SHAPE: HEXAGON
•
SURFACE TREATMENT: ZINC STANDOFF
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
LENGTH1.750 INCHES NOMINAL IN
THREAD LENGTH1.750 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
STYLE DESIGNATORINTERNALLY THREADED FULL LENGTH
THREAD DIRECTIONRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
NOMINAL THREAD SIZE0.375 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN
CROSS-SECTIONAL SHAPEHEXAGON
SURFACE TREATMENTZINC STANDOFF
PART NAME ASSIGNED BY CONTROLLING AGENCYHEX COUPLING NUT
THREAD CLASS2B LEFT INTERNAL (INCLUDES THRU THREAD)
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
10489-00253Same 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 90983A212?
90983A212 is a STANDOFF,THREADED,SPACING.
What parts can replace 90983A212?
There is 1 known substitute for 90983A212: 10489-00253. Substitute compatibility should be verified for your specific system.
What is the NSN for 90983A212?
90983A212 is cataloged in the U.S. Government catalog under NSN 5340-01-656-9325. 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.