Model: 28491

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 1.110 inches and 1.140 inches

Fastener Length

Between 1.235 inches and 1.265 inches

Head Style

Flat chamfer

Head Diameter

Between 0.429 inches and 0.437 inches

Head Height

Between 0.306 inches and 0.312 inches

Locking Feature

Patch threads

Internal Drive Style

Hexagon

Thread Diameter

0.312 inches

Width Across Flats

Between 0.219 inches and 0.228 inches

Thready Qty Per Inch (tpi)

Hardness Rating

26.0 rockwell c and 31.0 rockwell c

Material

Nickel alloy k-500

Material Specification

Qq-n-286 cl a federal specification single material response

Thread Series Designator

Unc

NSN

5305-00-897-6337

Part Number

28491

Description

Screw,cap,socket Head

CAGE

77842

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part 28491 NSN 5305-00-897-6337

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

FIIG:

A003B0

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:

0.1000lbs

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:

139820

UFC:

70220

LTL:

85.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7508900000
SITC: 69975
End Use: Finished metal shapes
NAICS: 332999
USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)