Model: 55-988-0

Round Plain Nut

Properties:

Thread Pitch Diameters

+1.1189/+1.1369 inches

Thread Direction

Right-hand

Drive Point Depth

0.094 inches

Nut Style

Round

Nut Diameter

Between 1.730 inches and 1.760 inches

Nut Thickness

Between 0.396 inches and 0.416 inches

Drive Point Width

Between 0.178 inches and 0.198 inches

Drive Point Quantity

End Application

W/s: missile, air-to-air, sparrow (aim-7); deep submergence systems programs (dssp); fire pumps; l.P. Comptessors; support equipment, b-1 aircraft; systems, jp-5 aviation fuels; boilers, 1200 psi; elevators, aircraft; main feed pumps

Thread Series

Uns

Thready Qty Per Inch (tpi)

Hardness Rating

Between 66.0 rockwell b and 92.0 rockwell b

Thread Size

1.173 inches

Material

Steel comp 1015 or steel comp 1016 or steel comp 1017 or steel comp 1018 or steel comp 1019 or steel comp 1020 or steel comp 1021 or steel comp 1023 or steel comp 1524 or steel comp 1025 or steel comp 1026 or steel comp 1527 or steel comp 1030 or steel comp 1033 or steel comp 1034 or steel comp 1035

Material Specification

66 federal standard all material responses

NSN

5310-00-185-6463

Part Number

55-988-0

Description

Nut,plain,round

CAGE

75377

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 55-988-0 NSN 5310-00-185-6463

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

15887

FIIG:

A021A0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

1.4000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

573

TCC:

SHC:

ACC:

Trailers/Vehicles

End Items End applications NSN 5310-00-185-6463 is a component of

Sparrow (aim-7); Deep Submergence Systems Programs (dssp); Fire Pumps; L.p Air-to-air W/s: Missile
Main Feed Pumps
Jp-5 Aviation Fuels Systems
B-1 Aircraft Support Equipment
Aircraft Elevators
1200 Psi Boilers
Fire Pumps
Sparrow (aim-7) Air-to-air Missile
Deep Submergence Systems Programs (dssp)
Adcap 48 Torpedo
011431212
Tank Type Water Distributor
011431213
Tank Type Water Distributor
004420312
Accele Test Station
007951797
Full Tracked Combat Engineer Vehicle
005315951
Scanner Drive
010568641
Speed Decreaser Gear Assembly
010656711
Speed Decreaser Gear Assembly

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Schedule B and Export

Schedule B: 7318160000
SITC: 69421
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Nuts of iron or steel