Rune Thread

Source
This item can be purchased for from all leatherworking suppliers, tailoring suppliers, and trade goods vendors.

As an ingredient
This item is used to make:
 * Golden Mantle of the Dawn
 * Runic Leather Headband
 * Belt of Deep Shadow
 * Netherweave Tunic
 * Frostsaber Tunic
 * Flameheart Vest
 * Boots of Blasting
 * Mooncloth Leggings
 * Wild Draenish Gloves
 * Frostweave Tunic
 * Imbued Netherweave Robe
 * Black Dragonscale Breastplate
 * Wild Draenish Leggings
 * Soul Pouch
 * Boots of Natural Grace
 * Ghostweave Gloves
 * Mooncloth Gloves
 * Boots of the Long Road
 * Felcloth Gloves
 * Arcanoweave Robe
 * Scaled Draenic Vest
 * Felcloth Shoulders
 * Truefaith Vestments
 * Molten Helm
 * Brightcloth Gloves
 * Black Dragonscale Shoulders
 * Blood Tiger Breastplate
 * Mooncloth Circlet
 * Heavy Scorpid Bracers
 * Wizardweave Turban
 * Living Shoulders
 * Imbued Netherweave Tunic
 * Fel Leather Gloves
 * Runic Leather Pants
 * Enchanted Runecloth Bag
 * Living Leggings
 * Core Armor Kit
 * Mooncloth Boots
 * Silver Spellthread
 * Netherfury Belt
 * Heavy Clefthoof Boots
 * Chimeric Gloves
 * Flarecore Wraps
 * Felcloth Robe
 * Felcloth Hood
 * Red Dragonscale Breastplate
 * Inferno Gloves
 * Netherweave Belt
 * Soulcloth Shoulders
 * Flarecore Mantle
 * Arcanoweave Boots
 * Wildfeather Leggings
 * Dawn Treaders
 * Blue Dragonscale Leggings
 * Wizardweave Robe
 * Robe of the Void
 * Heavy Scorpid Belt
 * Netherweave Pants
 * Gordok Ogre Suit
 * Felscale Boots
 * Mongoose Boots
 * Thick Draenic Gloves
 * Cloak of Fire
 * Felstalker Bracers
 * Wicked Leather Belt
 * Chimeric Leggings
 * Frostweave Gloves
 * Stylin' Adventure Hat
 * Warbear Harness
 * Green Dragonscale Gauntlets
 * Felcloth Pants
 * Brightcloth Cloak
 * Flameheart Bracers
 * Runic Leather Armor
 * Black Dragonscale Boots
 * Mooncloth Vest
 * Blackstorm Leggings
 * Frostweave Robe
 * Runecloth Cloak
 * Belt of the Long Road
 * Belt of the Archmage
 * Blood Tiger Shoulders
 * Heavy Scorpid Gauntlets
 * Belt of Blasting
 * Wicked Leather Armor
 * Hide of the Wild
 * Scaled Draenic Boots
 * Felcloth Boots
 * Corehound Boots
 * Volcanic Breastplate
 * Runecloth Gloves
 * Golden Spellthread
 * Runecloth Robe
 * Frostsaber Leggings
 * Heavy Scorpid Vest
 * Felscale Gloves
 * Might of the Timbermaw
 * Heavy Clefthoof Leggings
 * Runecloth Belt
 * Wicked Leather Bracers
 * Robe of Winter Night
 * Frostsaber Gloves
 * Onyxia Scale Cloak
 * Boots of the Crimson Hawk
 * Ironfeather Shoulders
 * Golden Dragonstrike Breastplate
 * Gloves of Spell Mastery
 * Living Crystal Breastplate
 * Thick Draenic Vest
 * Chimeric Vest
 * Living Breastplate
 * Robe of the Archmage
 * Boots of Utter Darkness
 * Primal Batskin Gloves
 * Monsoon Belt
 * Ghostweave Belt
 * Primalstorm Breastplate
 * Runecloth Headband
 * Wild Draenish Vest
 * Black Dragonscale Leggings
 * Blue Dragonscale Breastplate
 * Cindercloth Gloves
 * Warbear Woolies
 * Runic Leather Bracers
 * Heavy Scorpid Leggings
 * Wild Draenish Boots
 * Netherweave Bracers
 * Volcanic Shoulders
 * Fel Leather Leggings
 * Belt of the Black Eagle
 * Heavy Scorpid Helm
 * Runic Leather Shoulders
 * Runecloth Pants
 * Flarecore Gloves
 * Frostsaber Boots
 * Heavy Scorpid Shoulders
 * Netherfury Leggings
 * Arcanoweave Bracers
 * Chimeric Boots
 * Thick Draenic Boots
 * Green Dragonscale Leggings
 * Ironfeather Breastplate
 * Fel Leather Boots
 * Primal Batskin Bracers
 * Bottomless Bag
 * Stormshroud Shoulders
 * Devilsaur Gauntlets
 * Wicked Leather Pants
 * Runecloth Bag
 * Netherweave Bag
 * Stylin' Crimson Hat
 * Netherweave Robe
 * Swift Flight Bracers
 * Dragonstrike Leggings
 * Volcanic Leggings
 * Hurricane Boots
 * Cindercloth Vest
 * Runic Leather Gauntlets
 * Stormshroud Pants
 * Runecloth Shoulders
 * Runecloth Boots
 * Runecloth Tunic
 * Green Dragonscale Breastplate
 * Flameheart Gloves
 * Wizardweave Leggings
 * Felscale Pants
 * Ghostweave Vest
 * Stylin' Purple Hat
 * Stylin' Jungle Hat
 * Cindercloth Pants
 * Wicked Leather Headband
 * Felscale Breastplate
 * Cindercloth Cloak
 * Cloak of Warding
 * Scaled Draenic Pants
 * Devilsaur Leggings
 * Belt of Natural Power
 * Cenarion Herb Bag
 * Soulcloth Gloves
 * Mooncloth Bag
 * Runic Spellthread
 * Frostweave Pants
 * Girdle of Insight
 * Felstalker Breastplate
 * Mystic Spellthread
 * Netherweave Gloves
 * Netherfury Boots
 * Wicked Leather Gauntlets
 * Ghostweave Pants
 * Brightcloth Robe
 * Runic Leather Belt
 * Soulcloth Vest
 * Imbued Netherweave Boots
 * Mooncloth Robe
 * Blue Dragonscale Shoulders
 * Festival Suit
 * Netherweave Boots
 * Thick Draenic Pants
 * Scaled Draenic Gloves
 * Brightcloth Pants
 * Mooncloth Shoulders
 * Imbued Netherweave Pants
 * Shifting Cloak
 * Festival Dress
 * Stormshroud Armor
 * Chromatic Cloak
 * Felstalker Belt
 * Heavy Clefthoof Vest
 * Primal Batskin Jerkin

As a quest objective
Prior to patch 4.0.3a, this item was an objective for the following quest:
 * The Gordok Ogre Suit