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1S-1122-5-20 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1S-1122-5-20: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY R-405 OR NICKEL ALLOY 400 OVERALL, nut_style: HEXAGON, nut_height: 0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-272-5703, 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
1S-1122-5-20
NSN: 5310-00-272-5703
FSC: 5310 — Nuts and Washers
CAGE: 85130 — FLOWSERVE CORPORATION DIV FLOWSERVE US INC (USA)
SPECIFICATIONS
materialNICKEL ALLOY R-405 OR NICKEL ALLOY 400 OVERALL
nut_styleHEXAGON
nut_height0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
width_across_flats1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
nominal_thread_size0.875 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch9
material_document_and_classificationQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-272-5703
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1S-1122-5-20 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.875 INCHES IN
•
NUT HEIGHT: 0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.875 INCHES IN
NUT HEIGHT0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH9
MATERIALNICKEL ALLOY R-405 OR NICKEL ALLOY 400 OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 7
CP8422AReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
504-4325674 PIECE 11Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-1222Reference document
Same NSN cross-reference
Reference document — Secondary reference
M1222NIX14C20NANNSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MIL-S-1222Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE J2295Reference document
Same NSN cross-reference
Reference document — Identification 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 1S-1122-5-20?
1S-1122-5-20 is a NUT,PLAIN,HEXAGON.
What parts can replace 1S-1122-5-20?
There are 7 known substitutes for 1S-1122-5-20: CP8422A, 504-4325674 PIECE 11, MIL-DTL-1222 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1S-1122-5-20?
1S-1122-5-20 is cataloged in the U.S. Government catalog under NSN 5310-00-272-5703. 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.